/Engine/Source/Runtime/Engine/Public/ParticleHelper.h
AnimTrail payload
struct FAnimTrailTypeDataPayload : public [FTrailsBaseTypeDataPayload](API\Runtime\Engine\FTrailsBaseTypeDataPayload)
FVector3f
Direction
Direction from the first socket sample to the second.
float
InterpolationParameter
Parameter of this knot on the spline
float
Length
Half length between the sockets. First vertex = Location - Dir * Length; Second vertex = Location + Dir * Lenght.
FVector3f
Tangent
Tangent of the curve.